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dc.contributor.authorCuesta-Garcia, Ana Maria
dc.contributor.authorIchikawa, Rodrigo U.
dc.contributor.authorLondono-Zuluaga, Diana
dc.contributor.authorGomez-de-la-Torre, Maria de los Angeles 
dc.contributor.authorSantacruz-Cruz, Maria Isabel 
dc.contributor.authorTurrillas, Xavier
dc.contributor.authorGarcía-Aranda, Miguel Ángel 
dc.date.accessioned2017-05-12T10:24:13Z
dc.date.issued2017-06
dc.identifier.citationCement and Concrete Research 96 (2017) 1–12es_ES
dc.identifier.issn0008-8846
dc.identifier.otherhttps://doi.org/10.1016/j.cemconres.2017.02.025
dc.identifier.urihttp://hdl.handle.net/10630/13633
dc.description.abstractThere are many commercially important multiphase materials which contain amorphous phases, such as cement pastes, porcelains, glass-ceramics or pharmaceutical compounds. However, the analysis of amorphous phase(s) within cement matrices that contain high amounts of crystalline phase(s) is a challenge. Here, we report measurements of total scattering data quantitatively analyzed by Pair Distribution Function (PDF) minimization and Rietveld methodology to determine phase compositions including both amorphous and nanocrystalline phase contents in cement-related samples. Furthermore, laboratory techniques were used to complement the sample characterization. In addition to five reference materials, the main phase of calcium aluminate cements, CaAl2O4 hydrated at 50 °C to yield crystalline hydrogarnet, Ca3Al2(OH)12, (43wt%) and nanocrystalline aluminum hydroxide gel, Al(OH)3·0.1H2O (50wt%) was also investigated. The PDF analyses revealed that the hydroxide gel has a gibbsite local structurewith an average particle size close to 5nm. PDF and Rietveld quantitative phase analysis results fully agree.es_ES
dc.description.sponsorshipThis work has been supported by Spanish MINECO through BIA2014-57658-C2-1-R and BIA2014-57658-C2-2-R, which is cofunded by FEDER, research grants. R.U.I. acknowledges funding of CNPQ, grant no. 206983/2014-0/SWE. We also thank CELLS-ALBA (Barcelona, Spain) for providing synchrotron beamtime at BL04-MSPDand Dr. Oriol Vallcorba for his assistance during the synchrotron experiment.es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.subjectCristalografía por rayos Xes_ES
dc.subjectCementoes_ES
dc.subject.otherX-ray diffractiones_ES
dc.subject.otherCalcium aluminate cementes_ES
dc.subject.otherHydrogarnetes_ES
dc.subject.otherAmorphous materiales_ES
dc.subject.otherAluminum hydroxide geles_ES
dc.titleAluminum Hydroxide Gel Characterization within a Calcium Aluminate Cement Paste by Combined Pair Distribution Function and Rietveld Analyseses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.centroFacultad de Cienciases_ES
dc.description.embargo2018-07-01
dc.cclicenseby-nc-ndes_ES


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